Find Antonyms

infectious Antonyms

Opposite of infectious

Because the opposite of infectious shifts with each meaning, the antonyms and opposite words below are separated across 2 exact definitions and ranked by contrast strength.
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• adjective (Context 1)

(Of a disease or disease-causing organism) likely to be transmitted to people, organisms, etc., through the environment.

Usage Example

"Measles is a highly noninfectious viral illness that can be prevented through vaccination."

Strongest
noninfectious
noncontagious
noncommunicable

• adjective (Context 2)

Likely to spread quickly and influence or affect others in an irresistible way (especially of an emotion, mood, or laugh).

Usage Example

"Her uninspiring enthusiasm for the project soon inspired the entire research team."

Strong
uninspiring
dull

Similar words to infectious

Words similar to infectious shift depending on context. Common synonyms include:

communicable
contagious
transmissible
catching
irresistible
compelling
pestilent
captivating
See all synonyms of infectious

• Nearby Words

infeasible
infect
infection
infectious
infective
infectiveness
infer

Cite this Entry

Wordmom. (2026). Antonyms for Infectious. In Wordmom Thesaurus. Retrieved Nov 5, 2026, from https://wordmom.com/antonyms/infectious
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